utils add

src/utils.cpp

@@ -0,0 +1,25 @@
+//
+// Created by shaohuatong on 06.12.19.
+//
+
+#include "utils.hpp"
+
+int utils::squareOfDistance(vkvm::Coordinates x, vkvm::Coordinates y) {
+    return (x.x - y.x) * (x.x - y.x) + (x.y - y.y) * (x.y - y.y);
+}
+
+int utils::getDistance(vkvm::Coordinates x, vkvm::Coordinates y) {
+    return (int)floor(sqrt(squareOfDistance(x, y)));
+}
+
+int utils::min(int x, int y) {
+    if(x <= y)
+        return x;
+    return y;
+}
+
+int utils::max(int x, int y) {
+    if(x<=y)
+        return y;
+    return x;
+}

src/utils.hpp

@@ -0,0 +1,21 @@
+//
+// Created by shaohuatong on 06.12.19.
+//
+
+#ifndef SIMPLE_DRAW_UTILS_HPP
+#define SIMPLE_DRAW_UTILS_HPP
+
+#include "vkvm.hpp"
+#include "internal.hpp"
+#include "math.h"
+
+class utils {
+public:
+    static int squareOfDistance(vkvm::Coordinates x, vkvm::Coordinates y);
+    static int getDistance(vkvm::Coordinates x, vkvm::Coordinates y);
+    static int min(int x, int y);
+    static int max(int x, int y);
+};
+
+
+#endif //SIMPLE_DRAW_UTILS_H